PDC 2000/3000 Repair Manual
Diagnostics and Troubleshooting
77
Guide 4-4. Image Quality
Problem
Cause
Corrective Action
Poor Focus:
Note:
Before checking focus problems:
•
Take a 14” and a 4” picture. Look at distance measured - picture should
be in focus.
•
Listen for focus gear movement. Focus gear will not move if lens magnet is
missing or changed position. Camera will not Autofocus without lens magnet.
•
Listen for sonar firing.
•
Check focus for bushing, erratic curve, etc.
AutoFocus Button
•
Set to Off.
•
Reset Autofocus to On.
•
Defective Autofocus.
•
Replace Autofocus
PC board.
PC board.
Distance
•
Defective Sonar
•
Replace Sonar (Transducer).
Measurement
(Transducer )
Incorrect.
•
Defective Front End PC
•
Replace Front End PC board.
board.
Focus Gear
•
Missing or incorrectly
•
Replace or reposition lens
(No Movement)
positioned lens magnet.
magnet.
•
Defective focus motor.
•
Replace Optics Module
assembly.
•
Damaged focus motor
•
Replace Optics Module
flex.
assembly.
Focus Gear
•
CCD flex hitting focus
•
Reposition CCD flex.
(Grinding sound
gear.
when trying to
focus)
•
LCD tab hitting focus
•
Reposition LCD tab.
gear.
